SKF62311-2RS1Deep Groove Ball Bearing — Wide Section, 55 mm ID, 120 mm OD, 43 mm Width, Contact Seals Both Sides, Grease Filled

Product Description

What this part is

SKF 62311-2RS1 single-row, wide-section deep groove ball bearing with contact seals on both sides. Bore Diameter: 55 mm. Outside Diameter: 120 mm. Overall Width: 43 mm. Rolling Elements: Ball. Number Of Rows: 1. Bore Type: Straight. Seal Type: Contact seals both sides. Lubricant: Grease. Cage Material: Pressed steel. Internal Clearance: CN. Bearing Material: Bearing steel. Item Weight: 1.99 kg (4.39 lb). Snap Ring Included: No. Unit Quantity: 1 Pc.

Decoding the designation

623 — the wide-section deep groove series. A 623xx carries the same bore and outside diameter as the matching 63xx but in a wider ring, so it takes more load and more axial capacity in the same shaft and housing bores.

11 — bore code. 11 × 5 = 55 mm.

2RS1 — contact seals on both sides. The seal lip runs on the inner ring, holding the grease charge in and contamination out.

What these specs mean in practice

Dynamic Load Rating: 71,500 N. Static Load Rating: 45,000 N. The pair sets bearing life under rotation and the permanent-deformation limit at rest.

Limiting Speed: 3,800 rpm. The bearing is grease filled and sealed for life, so this is the grease figure; there is no separate oil rating for a sealed bearing.

Internal Clearance: CN, the normal radial clearance class. Deep groove geometry carries radial load and axial load in both directions, which is what lets a single bearing locate a shaft in a simple housing.

The width is the reason to specify this part:

The 55 x 120 mm envelope is shared with the far more common 6311, which is 29 mm wide. This bearing is 43 mm wide. A search that filters on bore and outside diameter alone will return both, and the width is what decides whether it fits and what it will carry. Overall Width: 43 mm.

Mounting data

Bore Type: Straight, mounted with an interference fit on the shaft journal. Bore Diameter: 55 mm. Outside Diameter: 120 mm. Overall Width: 43 mm. Item Weight: 1.99 kg (4.39 lb). Harmonization Code: 8482.10.50. eCl@ss Code: 23-05-08-01. UNSPSC Code: 31171504. Carbon Footprint: 7.4 kg CO2e.

Quantity and configuration

Unit Quantity: 1 Pc. A single bearing, supplied as one piece.

Interchange guidance

Same 55 x 120 x 43 mm envelope with contact seals both sides: FAG 62311-2RSR, NSK 62311DDU, NTN 62311LLU, Koyo 62311-2RS, Nachi 62311-2NSE.